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Think about Loose Coupling
 
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You are right. A more complicated scheme would be required for multiple user-id passwords. One method could be to store these user-id pairs in advance in a hash data file, say ../data/user_id, then check the incoming user-id pair against values in the existing hash. For example:

#/usr/bin/perl use CGI qw(:standard); use GDBM_File; use strict; my $q=new CGI; # Assume an existing saved hash %user_id with 'user' as the key and ' +id' as the value # created earlier by $user_id{"$user"} = $id and stored in ../data/us +er_id my $verify = "../data/user_id"; tie %user_id, 'GDBM_File', $verify, O_RDWR, 0666 or die "Can't tie $ve +rify:$!"; my $user = $q->param('user'); my $id = $q->param('id'); # Check values from the query string against values in hash unless (exists $user_id{"$user"} && $user_id{"$user"} = $id) { print $q->header, $q->start_html(-title=>'Page not found'); print h2("This page was not found"), $q->end_html; exit; } untie %user_id; # Real page code follows
By now one has other worries, like being sure the hash is locked while a tie is taking place, about how to update and delete values from the hash, about passing a name-password without security, etc.

Better advice might be to learn about SSL and OS/Web Server authentication for the particular target platform.

In reply to Re: Re: Re: Preventing changes on the by Speedy
in thread Preventing changes on the by DaWolf

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